Analysis of a mathematical model of syntrophic bacteria in a chemostat

Miled El Hajji (1) , Tewfik Sari (1, 2) , Jérôme Harmand (1, 3)

1 MISTEA - Mathématiques, Informatique et STatistique pour l'Environnement et l'Agronomie
2 LMIA - Laboratoire de Mathématiques Informatique et Applications [UHA]
3 LBE - Laboratoire de Biotechnologie de l'Environnement [Narbonne]

A mathematical model involving a syntrophic relationship between two populations of bacteria in a continuous culture is proposed. A detailed qualitative analysis is carried out. The local and global stability analysis of the equilibria are performed. We demonstrate, under general assumptions of monotonicity, relevant from an applied point of view, the asymptotic stability of the positive equilibrium point which corresponds to the coexistence of the two bacteria. A syntrophic relationship in the anaerobic digestion process is proposed as a real candidate for this model.

Mots clés: Syntrophic relationship; Mathematical modelling; Coexistence; Asymptotic stability; Anaerobic digestion

Domaines: Systèmes dynamiques [math.DS]

Miled El Hajji, Tewfik Sari, Jérôme Harmand. Analysis of a mathematical model of syntrophic bacteria in a chemostat. 2010. ⟨hal-00487189v1⟩